Automatic feed mechanism for metal-working machines.



No. 648,2. Patented Apr. 24, I900.

r. MAR GGRAFF. AUTOMATIC FEED MECHANISM FOR METAL WORKING MACHINES.

(Applicatim) filed Feb. 24, 1899.)

(No Model.) 5 Sheets-Sheet I.

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No. 648,2". S Patented Apr. 24, I900.

F. MARGGRAFF.

AUTOMATIC FEED MECHANISM FOR METAL WORKING MACHINES.

(Application filed Feb. 24, 1899.) (No Model.) Q 5 Sheets$heet 2.

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C7% L M 1 m 4; ATTORNEYS TN: norms PETERS ca, woYouTno wAsnmeTcm 0, c4 7No. 648,2. Patented Apr. 24, 1900.

.r. MABGGRAFF;

AUTOMATIC FEED MECHANISM FOR MET-AI. WORKING MACHINES.

(AppIica-tion filed Feb. 24, 1899.}

(No Model.) 5 Sheets-Sheet 3.

INVENTOR WITNESSES: \S

. BY/jm a MW 77 I I ATTORNEYS I No. 648,2". Patented Apr. 24, I900.

F. MARGGRAFF. 7

AUTOMATIC FEED MECHANISM FOR METAL WORKING MACHINES.

(Application filed Feb. 24, 1899.) (No Model.) 5 Sheets-Sheet 4.

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WITNESSES: INVENTOR A ATTORNEYS ml: ngnma mm: co, mom-m, wmiuarou. n. c.

.No. 648,2. Patented Apr. 24,. I900.

F. MARGGRAFF.

AUTOMATIC FEED MECHANISM FOR METAL WORKING MACHINES. (Application filedFeb. 24, 1899.)

(No llodal.) 5 Sheets-Sheet 5.

WITNESSES: mvamon A ATTORNEYS ijrnrn STATES PATET men.

FREDRIOK MAReeRAi F, OF WATERBURY, oonnno'riour, Assienon on ONE-HALF TOALBERT D. FIELD, on SAME PLACE.

AUTOMATIC FEED MECHANISM FOR METAL-WORKING MACHINES;

SPECIFICATION forming part of Letters Patent No. 648,211, dated April24, 1966.

Application filed February 24, 1899. Serial No. 706,658. (No model.)

Te all whom, it may concern: I

Be it known that I, FREDRICK MARGGRAFF, a citizen of the United States,and a resident of Waterbury, New Haven county, State of Connecticut,have invented certain new and useful Improvements in Automatic FeedMechanism for Metal-\Vorking and other Machines, of which the followingis a full, clear, and exact description.

My invention relates .to automatic feed mechanism for metal-workingmachines; and one object of said invention is to provide a simple andefficient feed mechanism for antomatically and intermittently feedingstrips of metal or other suitable material of different widths bothlaterally and longitudinally to the punch or other device to be operatedupon.

Afurther object of myinvention is to provide feed mechanism which may bereadily adjusted to change the extent of lateral and longitudinal feedgiven to the material. I

To these ends my invention consists in the novel arrangement andcombination of parts hereinafter described and claimed.

In the accompanying drawings, wherein like characters representcorresponding parts in the various views, Figure 1 is a perspective Viewof one form of feed mechanism embodying myinvention and of sufficientnumber of parts of a metal-workin g machine to show the applicationthereof. view of the feed mechanism. Fig. 3 is a plan View of the same.Fig. 4 is an end view of the mechanism lookingin the direction of thearrow in Fig. 3. Fig. 5 is an enlarged detail end view of the upperportion of the parts represented in Figs. 1 and 2 of the drawings. Fig.6 is a front view of the same.

My present invention is in the nature of an improvement upon the feedingdevice heretofore patented by me in Letters Patent No. 252,786, datedJanuary 2%, 1882. The device forming the subject-matter of the presentinvention is much more simple in construction and is easier to adjustthan the said patented device and not so liable to get out of order orout'of adjustment.

In the drawings, A represents the framing of any suitable machine-such,for instance, as a metal-punching machine. In' the up Fig. 2 is a detailside the main shaft B is carried a slideway 1), (see Figs. 5 and 6,) inwhich a slide or block 0 is adjustably carried, and from this block 0pro= jects one member d of a universal joint, the other member 6 of thisuniversal joint being carried by a cam-operating rod 0. It will beobserved that the member dof the universal joint in the present instanceconstitutes a Wrist-pin and that the position thereof, asdetermined bythe adjustment of the block cin the slideway 19, determines the extentof throw given to the rod 0. The lower end of the cam=operating rod 0 isconnected to a vibratory pivoted arm f by means of a universal joint g.This armfcarries a pawl h, which engages a cooperating ratchet-wheel t',that is fixed upon a shaft j. This ratchet-wheel t preferably has twiceas many teeth as there are blanks to be punched in the width of'themetal. Thus, for instance, if there are seven blanks to be punched inthe Width of the metal fourteen teeth will preferably be provided on theratchet-wheel, so that a complete revolution of the ratchet-wheel willgive a reciprocation to the feed-carriage in opposite directions, aswill hereinafter appear. The opposite end of this shaft j has a cam-Wheel D rigidly connected thereto, so that a movement imparted to theratchet-wheel i will be communicated to the cam-wheel. Cooperating withthe cam-groove 7c of the caniwheel D is a projecting pin or roller Z,carried by a movable slideway E, in which a block carrying a pivot-pinmisadjustablysecured. One end of a pitman-rod F is connected to thispivot-pin m, while the other end of the rod is pivotally connected to a'feed-carriage G, which is adapted to slide on the tracks a: in adirection substantially transverse to the length of the materialoperated upon. The

pitman-rod F is preferably made in two sec-' tions,which are united by aright and left hand capstan-screw a or other means for adjusting the twosections so as to lengthen or shorten the rod to compensate for anychange in throw of the rod by an adjustment of the block which carriesthe pivotpin m. In other words, the capstan-screw allows of the properpositioning of the carriage, so as to bring the metal initially in theproper position to be operated upon, whereas the adjustment of the blockwhich carries the pivot m determines the extent of each intermittentmovement given to the carriage. A link H is pivotally connected to theslideway E at one end, and its opposite end is pivoted, as indicated at0, to a fixed depending bracket 19.

So much of the mechanism as I have described comprises the means forintermittently moving the carriage, and I will now describe the meansfor feeding the material longitudinally to the punches or other deviceto operate thereon.

Upon the main shaft of the machine is carried a cam q, with which onearm of the bellcrank lever r cooperates. An arm of this lever ismaintained in constant contact with the cam by means of the spring .9.The other arm of the lever r is pivoted to a feed-rolloperating rod 1,which is connected to a pivoted vibratory pawl-carrier J, to which aspring-pressed pawl t is pivoted. This pawl t carries a pin u,which isadapted to bear upon a segmental guard K, that projects from a movablesupport L, which will be hereinafter more fully described.' The pawl ifcooperates with a ratchet-wheel M, which is fixed upon a shaft N, whichis suitably mounted to allow rotation but no longitudinal movementthereof. This shaft N is provided with a splinegroove 0, (see Fig. 2,)in which a feather in, carried by a bevel-pinion 0, projects. Thispinion O is carried by the feedcarriage G and byreasou of the connectionjust described may be rotated by the shaft N irrespective of theadjustment of the carriage G. The pinion O meshes with the correspondingpinion P, carried by the feed-carriage, and this latter pinion isconnected to a feed-roller R, on the shaft of which is carried agearwheel S. This gear-wheel S meshes with the corresponding gear-wheelT, fixed upon the shaft of which is an upper feed-roller U, whichcooperates with the roller R to feedthe strip of metal longitudinally tothe punch. The bearings of the upper feed-roller U are preferablyadapted to slide vertically in the framing of the feed-carriage, and ahandle V is provided to move the upper feed-roller up or down to causeit to cooperate with the lower feed-roller to release or clamp themetal, as the case may be. When the handle has been operated to move theupper feed-roller so as to compress the metal strip between it and thelower feed-roller, the parts are in position to feed the strip when therolls are automatically rotated, as will be hereinafter described.

On the periphery of the cam-wheel D are depressed portions y andelevated portions z, and on these portions y and z a pin a (see Fig. 3)is adapted to bear, as determined by the position of the cam-wheel.

The pin ct is carried by a carrier W, pivoted to the framing of themachine, as indicated at b. The free end of this pivoted carrier isslotted, as indicated at c, and into this slot projects a pin cl,extending from the movable support L, to which the guard K is connected.It will be observed by reference to Fig. 4c'of the drawings that whenthe pin a rests upon the elevated portion 2 of the cam-Wheel D thesegmental guard K will maintain the pawl t elevated above the teeth ofthe ratchet-wheel M and that an oscillation of said pawl, with itscarrier J, will not impart any movement of the ratchet wheel, whereaswhen the pin a rests upon a depressed portion y of the.

cam-wheel D the pawl will be allowed'to engage the ratchet-wheel M andto feed the rollers R U. It will thus be understood that each of thecam-like portions 5 7 on the periphery of the cam-wheel D raises orlowers the guard K,as the case may be, and in this manner determines thetime when motion may be transmitted to the feed-rollers.

Having described the construction of one form of device embodying myinvention, I will now proceed to describe the operation thereof.

We will suppose for the purpose of illustration that seven blanks are tobe cut in the width of the metal to beoperated upon. The block carryingthe pivot-pin m is first adjusted so that each downward movement of therod 0 will cause the carriage G to be moved on its tracks to feed themetal strip laterally a slightly-greater distance than the width of theblank to be out. The capstanscrew it is next adjusted so as to bringtheedge of the metal strip near the path of the punch for the initialcutting. The slide 0 is then adjusted so as to give the proper throw tothe rod ,0 in order that fourteen downward movements transmitted theretowill give a complete revolution to the cam-wheel D. The metal strip isthen placed between the feed-rollers R U, and the handle V is operatedto cause the rolls to clamp the strip between them. The machine is thenset in operation, and the feed mechanism will be automatically andintermittently operated to feed the carriage laterally seven times,during which time the pin a rests upon the elevated portion a of thecam-wheel D and no motion will be imparted to the ratchet-wheel K. Afterthe seventh movement of the carriage a depressed portion 1 of thecam-wheel D reaches the pin a and the pawl t is allowed to engage itsratchet-wheel K to turn the feed-rollers, so as to feed the material adistance a little greater than the length of a blank, when an elevatedportion a of the cam is again reached and the pawl t is elevated out ofengagement with its ratchet-wheel. Further rotation of the canrwheel Dwill cause the carriage to be intermittently moved seven times in theopposite direction from that in which it was first moved, when thelongitudinal feed will again take place in the manner above described,and so the feed device will be automatically and intermittently operatedat each descent of the punch or at each operation of the main shaft B.

It will be observed that an intermittent reciprocating movement isimparted by the rotating element or cam to the carriage whichcorresponds to the intermittent reciprocating movement imparted to therod or connection 1* and that no mechanismneed be employed intermediateof the cam and carriage for effecting a change in the direction ofmovement of the carriage.

While I have shown and described with considerable detail one form offeed mechanism embodying my invention, I would have it understood thatvarious changes in detail may be made to adapt my feed device todifferent types of machines or to different ends to be attained withoutdeparting from the spirit of my invention.

Having described my invention, what I claim, and desire to secure byLetters Patout, is

1. In a feed device, the combination of a feed-carriage, means carriedby said carriage for feeding the material in one direction, means forautomatically and intermittently operating said feeding means, apitman-rod connected to the carriage to intermittently reciprocate thesame in opposite directions and in a direction at an angle to the lineof feed of the first-mentioned feeding means and means for adjusting thethrow of said rod.

2. In a feed device, the combination of a feed-carriage, feed-rollerscarriedbysaid carriage, means for automatically and intermittentlyrotating said feed-rollers, a pitman-rod connected to said carriage,acam for automatically and intermittently reciprocating said rod inopposite directions and means for'adjust-ing the throw of said rod.

3. In a feed device, the combination of a feed-carriage, meansparried bysaid carriage for feeding the material in one direction, means forautomatically and intermittently operating said feeding means, means forchanging the'extent of the intermittent feed of said feeding means, apitman rod connected to said carriage to intermittently-reciprocate thesame in opposite directions and means for adjusting the throw of saidrod.

at. In a feed device, the combination of a feed-carriage, feed-rollerscarried by said carriage, means for automatically and intermittentlyrotating said feed-rollers, a cam-wheel, means for intermittentlyrotating said camwheel, an intermediate rod or link between saidcam-wheel and carriage and means for adjusting the throw of said rod.

5. In a feed device, the combination of a feed-carriage, feed-rollerscarried by said carriage, means for automatically and intermittentlyrotating said feed-rollers, a cam-wheel, means for intermittentlyrotating said camwheel, an intermediate rod or link between saidcam-wheel and carriage, means for ad justing the throw of said rod andmeans for adjusting thelength of said rod.

6. Ina feed device, the combination of a feed-carriage, feed-rollerscarried by said carriage, means for automatically and intermittentlyrotating saidfeed-rollers, a cam-wheel, means for intermittentlyrotating said camwheel, means for varying the extent of intermittentrotation imparted to said cam-wheel, an intermediate rod or link betweensaid camwheel and carriage and means for adjusting the throw of saidrod.

7. In a feed device, the combination of a feed-carriage, feed-rollerscarried by said carriage, means for automatically and intermittently.rotating said feed-rollers mechanism for automatically throwing thefeed-roller-opcrating means'into and out of operation, a cam-wheel,means for intermittently rotating said cam-wheel, an intermediate rod orlink between said cam-wheel and carriage and means for adjusting thethrow of said rod.

8. In a feed device, the combination of .a feed-carriage, feed-rollerscarried by said carriage, means for automatically and intermittentlyrotating said feed-rollers, mechanism for automatically throwing thefeed-roller-operating means into operation when the carriage reaches theend of its travel in either direction and for automatically throwingsaidoperating means out of operation after an intermittent rotation has beenimparted to the feed-rollers, a cam-wheel, means for intermittentlyrotating said cam-wheel, an inter mediate rod or linkbetween saidcam-wheel and carriage and means for adjusting the throw of said rod. p

9. In a feed device, the combination of a feed-carriage,feed-rollerscarried by said carriage, means for automatically and intermittentlyrotating the said feed-rollers, mechanism for automatically throwing thefeedroller-operating means into operation when the carriage reaches theend of its travel in either direction and for automatically throwingsaid operating means out of operation after an intermittent rotation hasbeen imparted to the feed-rollers, a cam-wheel, means for intermittentlyrotating said cam-wheel, means for varying the extent of intermittentrotation imparted to said cam-wheel, an in termediate rod or linkbetween said camwheel and carriage, means for adjusting the throw ofsaid rod and mechanism for adjusting the length of said rod.

10. In a feed device, the combination of a feed-carriage, means carriedby said carriage for feeding the material in one direction, means forautomatically and intermittently operating said feeding means, rotatingmeans for imparting a movement to said carriage and connections betweensaid carriage and rotating means for impartinga movement to the carriagewhich corresponds to the movement imparted to the connections by saidrotating means.

11. In a feed device, the combination of a feed-carriage, means carriedby said carriage corresponds to the movement imparted to the for feedingthe material 1n one direction, connections by the cam.

means for automatically and intermittently i 1 operatingsaid feedingmeans, a cam for 1m- FREDRIOK MARGGRATF 5 parting a movement to saidcarriage and con- \Vitnesses:

nections between said carriage and cam for EMMA JUDGE,

imparting a movement to the carriage which HENRY WV. MINOR.

